If you live in Quebec, bankruptcy won't prevent you from sponsoring, it seems.
Otherwise, in theory, it can prevent you from being a sponsor if it happens before your wife becomes a PR. About nine months after your bankruptcy, it will be "discharged", and then you can sponsor again.
However, looking at Form 1344, I can't see anywhere it says that you are required to inform them if your circumstances change. It is possible that if CIC doesn't find out about it, you'll be okay. I'm not sure whether they check these things after your sponsorship is approved, so I think it would be appropriate to get advice from an immigration lawyer or consultant. They might tell you to wait and see what happens, or they might say that it's safer to withdraw your application and apply again after your bankruptcy has been discharged.